What is NOT done by a Mobile switching center?

Select one:

a$.$ Call transfer

b$.$ Frequency distribution

c$.$ Rooming

d$.$ Position determination of the mobile phones

What device can be used to measure the modulation quality?

Select one:

a$.$ Vector Signal Generator $($VSG$)$

b$.$ Vector Network Analyser $($VNA$)$

c$.$ Spektrum analyser $($SA$)$

d$.$ Vector Signal Analyser $($VSA$)$

Which modulation changes the transmitted power $?$

Select one:

A$.$ PM

B$.$ AM

C$.$FM

D$.$PM

The role of source coding is

Select one:

A$.$ correction of channel errors

B$.$ increase the redundance of the signal

C$.$compression

D$.$ correction of chanel noise

How many bits long symbol can be sent in a QAM$16$ modulaticon

Select one:

a$.16$

b$.15$

c$.5$

d$.8$

In case of the CDMA cellular network $(3$G$)$

Select one:

A$.$The devices transmitting at the same time use the same frequencies

B$.$ The devices transmitting at the same time use different frequencies

C$.$ The devices transmitting at the same time connect to different base stations D$.$ only one device can transmit at a given time.

In the UMTS system, the mobile phone Select one:

A$.$ can connect to multiply cells at the same time

B$.$ The transmission power of the mobile phone is constant.

C$.$The voice signal is transmitted as an analog

What does the handover$/$handoff expression mean?

Select one:

Handover $/$ handoff, ie if you turn off the manual control in the mobile to select the cells,

Handover $/$ handoff, ie when the mobile phone constantly monitors the cells and saves the most ideal one

Handover $/$ handoff, ie when the mobile phone selects the manual preset when choosing between different cells.

Handover $/$ handoff, i$.$e$.$ when the mobile device moves tto another cell, a handover occurs

What type of modulation uses a GPS satellite?

Select one:

a$.$ QAM

b$.$ ASK

c$.$ BPSK

d$.$ FSK

During CDMA the transmitted data is generated

Select one:

a$.$ The digital data and the spreading code is added together

b$.$ The digital data and the spreading code are subtracted

c$.$ The data is multiplied by a constant value

d$.$ The digital data is multiplied $($xor$)$ by a spreading code

In the GSM system the base station and the mobile device

Select one:

A$.$ the frequency of the base station is larger

B$.$ the frequency depends on the providers choice

C$.$ the frequency of the mobile station is larger

D$.$ use the same frequency

The following features of a circuit$-$switched network is more advantageous than that of a packet$-$switched network.

Select one or more:

A$.$ availability

B$.$ Garanteed quality

C$.$Garanteed operation time

D$.$flexibility

When the cell size is smaller, which statements are true $($more than one$)$

Select one or more:

A$.$ We need less number of base stations

B$.$ The power consumtion of the mobile phone is decreased

C$.$We can use less number of phones D$.$ The transmitter power is decreased

Which parameter of the carrier is NOT changed in a QAM modulation?

Select one:

a$.$Phase

b$.$ Amplitude

c$.$Frequency

What is NOT a task of the Base Station Subsystem

Select one:

a$.$Identification of the mobile phone user b$.$ Radio chanel assignement

c$.$ Transcode the signals

d$.$ Control one or more transsievers

What is NOT true for a cabel television based network access

Select one:

a$.$One must always encript the users data

b$.$ The users are connected to the same physical media

c$.$The upload channel have a larger bandwidth

d$.$ The download channel have a larger bandwidth

The control of the handover in the GSM system is performed

Select one:

A$.$ By the base station, based on the base stations received signal intensity B$.$ By the mobile phone, based on the received signal intensity

C$.$ By the base station, based on the mobile phones received signal intensity D$.$ By the mobile phone,based on the base stations received signal intensity

The media access technology in the GSM system is Select one:

A$.$ FDMA$+$TDMA

B$.$ TDMA

C$.$FDMA

D$.$CDMA

Minimum how many satelite signal reception is needed to find the position and time of the GPS$?$

Select one:

a$\mathrm{.}5$

b$\mathrm{.}3$

c$\mathrm{.}2$

d$\mathrm{.}4$

Which statement is FALSE for a GSM handover$/$handoff $?$

Select one:

a$.$The connection is broken for both towers

b$.$ The connection is not brooken or brooken depending on the service provider

c$.$The mobile is connected to both towers

d$.$ The connection is broken for one tower,

Order according to distance the following wireless technologies Bluetooth Short, WLAN Middle, Wimax Large

For an ADSL modem based internet access

Select one:

a$.$The bandwidth for upload is larger

b$.$ The bandwidth for download and upload is the same

c$.$The bandwidth for download is larger

Which method is used in wired telephony during the connection between switching centers?

Select one or more:

A$.$FDM

B$.$ SDM

$.$ XDM

D$.$TDM

Please give me these mcqs answers